sandeen
Posts: 125
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685
Location: Minnesota

2012 CANBUS wonky, dash lights flashing

Tue Nov 21, 2017 9:34 am

Ok, this was pretty weird - short 4 block drive this morning in my 2012, and noticed the entire (or at least most) dash display blinked off then on again; then random orange warning lights started appearing & disappearing - traction, EV system, fuel gauge light (though fully charged). LEAFSpy DTC scan had many CANBUS related errors.

This doesn't seem good. Has anyone seen this before? When I went back out w/ the LEAFSpy phone all was normal (other than the logged DTCs) and a drive around the block was uneventful ...

I wonder if there is any chance this is in any way related to the battery replacement I had a few weeks ago.

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2012 SL from TX, (mfg 8/12), used, dropped to 8 bars at 43.50 Ahr, 40,601 miles. my daily stats =/= my collected data on 4-bar losers

WetEV
Posts: 2261
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: 2012 CANBUS wonky, dash lights flashing

Tue Nov 21, 2017 9:58 am

Check your 12V battery voltage.
WetEV
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GerryAZ
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Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: 2012 CANBUS wonky, dash lights flashing

Tue Nov 21, 2017 6:55 pm

Also, check the 12-volt battery terminal connections and especially the chassis ground connection of the negative cable. The chassis ground connection looks like a cable support clip in the middle of the cable, but it is actually a compression terminal grounded to the chassis through the mounting bolt.
Gerry
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sandeen
Posts: 125
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685
Location: Minnesota

Re: 2012 CANBUS wonky, dash lights flashing

Wed Nov 22, 2017 9:07 am

I'll check out the 12V battery. Replaced it a month ago but who knows...
Thanks,
-Eric
2012 SL from TX, (mfg 8/12), used, dropped to 8 bars at 43.50 Ahr, 40,601 miles. my daily stats =/= my collected data on 4-bar losers

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davewill
Posts: 4933
Joined: Thu Mar 17, 2011 6:04 pm
Location: San Diego, CA, US

Re: 2012 CANBUS wonky, dash lights flashing

Wed Nov 22, 2017 9:29 am

sandeen wrote:I'll check out the 12V battery. Replaced it a month ago but who knows...
Thanks,
-Eric

Actually that makes me more suspicious. Could have got a bad one, or someone might have failed to tighten a connection adequately. It could be something bad in the new traction battery, but the 12v is much easier to check. Probably worth disconnecting the battery altogether for a few minutes to reset everything you can that way.
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DuncanCunningham
Posts: 516
Joined: Thu Mar 26, 2015 10:02 am
Delivery Date: 15 Apr 2015
Location: Bountiful, UT

Re: 2012 CANBUS wonky, dash lights flashing

Wed Nov 22, 2017 10:48 am

WetEV wrote:Check your 12V battery voltage.

+1 but don't bother to check, its not a normal battery in the sense that your car uses it.. get a battery tender on it for a few nights until the the tender says GREEN all the way. Clear any DTCs in the leaf spy program and you should be good.
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